revert os2/process

3 files changed, 35 insertions, 548 deletions

diff --git a/core/os/os2/process.odin b/core/os/os2/process.odin
index 099d1c19e..862434b7b 100644
--- a/core/os/os2/process.odin
+++ b/core/os/os2/process.odin
@@ -2,42 +2,36 @@ package os2
 
 import "core:sync"
 import "core:time"
-import "core:c"
+import "base:runtime"
 
-args: []string = _alloc_command_line_arguments()
+args: []string
 
 exit :: proc "contextless" (code: int) -> ! {
-	_exit(code)
+	runtime.trap()
 }
 
-@(require_results)
 get_uid :: proc() -> int {
-	return _get_uid()
+	return -1
 }
 
-@(require_results)
 get_euid :: proc() -> int {
-	return _get_euid()
+	return -1
 }
 
-@(require_results)
 get_gid :: proc() -> int {
-	return _get_gid()
+	return -1
 }
 
-@(require_results)
 get_egid :: proc() -> int {
-	return _get_euid()
+	return -1
 }
 
-@(require_results)
 get_pid :: proc() -> int {
-	return _get_pid()
+	return -1
 }
 
-@(require_results)
 get_ppid :: proc() -> int {
-	return _get_ppid()
+	return -1
 }
 
 
@@ -52,12 +46,16 @@ Process :: struct {
 Process_Attributes :: struct {
 	dir: string,
 	env: []string,
-	stdin: ^File,
-	stdout: ^File,
-	stderr: ^File,
+	files: []^File,
 	sys: ^Process_Attributes_OS_Specific,
 }
 
+Process_Attributes_OS_Specific :: struct{}
+
+Process_Error :: enum {
+	None,
+}
+
 Process_State :: struct {
 	pid:         int,
 	exit_code:   int,
@@ -68,53 +66,37 @@ Process_State :: struct {
 	sys:         rawptr,
 }
 
-Signal :: enum {
-	Abort,
-	Floating_Point_Exception,
-	Illegal_Instruction,
-	Interrupt,
-	Segmentation_Fault,
-	Termination,
-}
+Signal :: #type proc()
 
-Signal_Handler_Proc :: #type proc "c" (c.int)
-Signal_Handler_Special :: enum {
-	Default,
-	Ignore,
-}
+Kill:      Signal = nil
+Interrupt: Signal = nil
 
-Signal_Handler :: union {
-	Signal_Handler_Proc,
-	Signal_Handler_Special,
-}
 
-@(require_results)
-process_find :: proc(pid: int) -> (Process, Error) {
-	return _process_find(pid)
+find_process :: proc(pid: int) -> (^Process, Process_Error) {
+	return nil, .None
 }
 
-@(require_results)
-process_get_state :: proc(p: Process) -> (Process_State, Error) {
-	return _process_get_state(p)
-}
 
-@(require_results)
-process_start :: proc(name: string, argv: []string, attr: ^Process_Attributes = nil) -> (Process, Error) {
-	return _process_start(name, argv, attr)
+process_start :: proc(name: string, argv: []string, attr: ^Process_Attributes) -> (^Process, Process_Error) {
+	return nil, .None
 }
 
-process_release :: proc(p: ^Process) -> Error {
-	return _process_release(p)
+process_release :: proc(p: ^Process) -> Process_Error {
+	return .None
 }
 
-process_kill :: proc(p: ^Process) -> Error {
-	return _process_kill(p)
+process_kill :: proc(p: ^Process) -> Process_Error {
+	return .None
 }
 
-process_signal :: proc(sig: Signal, h: Signal_Handler) -> Error {
-	return _process_signal(sig, h)
+process_signal :: proc(p: ^Process, sig: Signal) -> Process_Error {
+	return .None
 }
 
-process_wait :: proc(p: ^Process, t: time.Duration = time.MAX_DURATION) -> (Process_State, Error) {
-	return _process_wait(p, t)
+process_wait :: proc(p: ^Process) -> (Process_State, Process_Error) {
+	return {}, .None
 }
+
+
+
+
diff --git a/core/os/os2/process_linux.odin b/core/os/os2/process_linux.odin
deleted file mode 100644
index aec838d9d..000000000
--- a/core/os/os2/process_linux.odin
+++ /dev/null
@@ -1,428 +0,0 @@
-//+private
-package os2
-
-import "base:runtime"
-
-import "core:fmt"
-import "core:mem"
-import "core:time"
-import "core:strings"
-import "core:strconv"
-import "core:sys/linux"
-import "core:path/filepath"
-
-_alloc_command_line_arguments :: proc() -> []string {
-	res := make([]string, len(runtime.args__), heap_allocator())
-	for arg, i in runtime.args__ {
-		res[i] = string(arg)
-	}
-	return res
-}
-
-_exit :: proc "contextless" (code: int) -> ! {
-	linux.exit_group(i32(code))
-}
-
-_get_uid :: proc() -> int {
-	return int(linux.getuid())
-}
-
-_get_euid :: proc() -> int {
-	return int(linux.geteuid())
-}
-
-_get_gid :: proc() -> int {
-	return int(linux.getgid())
-}
-
-_get_egid :: proc() -> int {
-	return int(linux.getegid())
-}
-
-_get_pid :: proc() -> int {
-	return int(linux.getpid())
-}
-
-_get_ppid :: proc() -> int {
-	return int(linux.getppid())
-}
-
-Process_Attributes_OS_Specific :: struct {}
-
-_process_find :: proc(pid: int) -> (Process, Error) {
-	TEMP_ALLOCATOR_GUARD()
-	pid_path := fmt.ctprintf("/proc/%d", pid)
-
-	p: Process
-	dir_fd: linux.Fd
-	errno: linux.Errno
-
-	#partial switch dir_fd, errno = linux.open(pid_path, _OPENDIR_FLAGS); errno {
-	case .NONE:
-		linux.close(dir_fd)
-		p.pid = pid
-		return p, nil
-	case .ENOTDIR:
-		return p, .Invalid_Dir
-	case .ENOENT:
-		return p, .Not_Exist
-	}
-	return p, _get_platform_error(errno)
-}
-
-_process_get_state :: proc(p: Process) -> (state: Process_State, err: Error) {
-	TEMP_ALLOCATOR_GUARD()
-
-	stat_name := fmt.ctprintf("/proc/%d/stat", p.pid)
-	stat_buf: []u8
-	stat_buf, err = _read_entire_pseudo_file(stat_name, temp_allocator())
-
-	if err != nil {
-		return
-	}
-
-	idx := strings.last_index_byte(string(stat_buf), ')')
-	stats := string(stat_buf[idx + 2:])
-
-	// utime and stime are the 12 and 13th items, respectively
-	// skip the first 11 items here.
-	for i := 0; i < 11; i += 1 {
-		stats = stats[strings.index_byte(stats, ' ') + 1:]
-	}
-
-	idx = strings.index_byte(stats, ' ')
-	utime_str := stats[:idx]
-
-	stats = stats[idx + 1:]
-	stime_str := stats[:strings.index_byte(stats, ' ')]
-
-	utime, _ := strconv.parse_int(utime_str, 10)
-	stime, _ := strconv.parse_int(stime_str, 10)
-
-	// NOTE: Assuming HZ of 100, 1 jiffy == 10 ms
-	state.user_time = time.Duration(utime) * 10 * time.Millisecond
-	state.system_time = time.Duration(stime) * 10 * time.Millisecond
-
-	return
-}
-
-_process_start :: proc(name: string, argv: []string, attr: ^Process_Attributes) -> (child: Process, err: Error) {
-	TEMP_ALLOCATOR_GUARD()
-
-	dir_fd := linux.AT_FDCWD
-	errno: linux.Errno
-	if attr != nil && attr.dir != "" {
-		dir_cstr := temp_cstring(attr.dir) or_return
-		if dir_fd, errno = linux.open(dir_cstr, _OPENDIR_FLAGS); errno != .NONE {
-			return child, _get_platform_error(errno)
-		}
-	}
-
-	// search PATH if just a plain name is provided
-	executable: cstring
-	if !strings.contains_rune(name, '/') {
-		path_env := get_env("PATH", temp_allocator())
-		path_dirs := filepath.split_list(path_env, temp_allocator())
-		found: bool
-		for dir in path_dirs {
-			executable = fmt.ctprintf("%s/%s", dir, name)
-			fail: bool
-			if fail, errno = linux.faccessat(dir_fd, executable, linux.F_OK); errno == .NONE && !fail {
-				found = true
-				break
-			}
-		}
-		if !found {
-			// check in cwd to match windows behavior
-			executable = fmt.ctprintf("./%s", name)
-			fail: bool
-			if fail, errno = linux.faccessat(dir_fd, executable, linux.F_OK); errno != .NONE || fail {
-				return child, .Not_Exist
-			}
-		}
-	} else {
-		executable = temp_cstring(name) or_return
-	}
-
-	not_exec: bool
-	if not_exec, errno = linux.faccessat(dir_fd, executable, linux.F_OK | linux.X_OK); errno != .NONE || not_exec {
-		return child, errno == .NONE ? .Permission_Denied : _get_platform_error(errno)
-	}
-
-	// args and environment need to be a list of cstrings
-	// that are terminated by a nil pointer.
-	// The first argument is a copy of the executable name.
-	cargs := make([]cstring, len(argv) + 2, temp_allocator())
-	cargs[0] = executable
-	for i := 0; i < len(argv); i += 1 {
-		cargs[i + 1] = temp_cstring(argv[i]) or_return
-	}
-
-	// Use current process's environment if attributes not provided
-	env: [^]cstring
-	if attr == nil {
-		// take this process's current environment
-		env = raw_data(export_cstring_environment(temp_allocator()))
-	} else {
-		cenv := make([]cstring, len(attr.env) + 1, temp_allocator())
-		for i := 0; i < len(attr.env); i += 1 {
-			cenv[i] = temp_cstring(attr.env[i]) or_return
-		}
-		env = &cenv[0]
-	}
-
-	// TODO: This is the traditional textbook implementation with fork.
-	//       A more efficient implementation with vfork:
-	//
-	//       1. retrieve signal handlers
-	//       2. block all signals
-	//       3. allocate some stack space
-	//       4. vfork (waits for child exit or execve); In child:
-	//           a. set child signal handlers
-	//           b. set up any necessary pipes
-	//           c. execve
-	//       5. restore signal handlers
-	//
-	stdin_fds: [2]linux.Fd
-	stdout_fds: [2]linux.Fd
-	stderr_fds: [2]linux.Fd
-	if attr != nil && attr.stdin != nil {
-		if errno = linux.pipe2(&stdin_fds, nil); errno != .NONE {
-			return child, _get_platform_error(errno)
-		}
-	}
-	if attr != nil && attr.stdout != nil {
-		if errno = linux.pipe2(&stdout_fds, nil); errno != .NONE {
-			return child, _get_platform_error(errno)
-		}
-	}
-	if attr != nil && attr.stderr != nil {
-		if errno = linux.pipe2(&stderr_fds, nil); errno != .NONE {
-			return child, _get_platform_error(errno)
-		}
-	}
-
-	pid: linux.Pid
-	if pid, errno = linux.fork(); errno != .NONE {
-		return child, _get_platform_error(errno)
-	}
-
-	IN  :: 1
-	OUT :: 0
-
-	STDIN  :: linux.Fd(0)
-	STDOUT :: linux.Fd(1)
-	STDERR :: linux.Fd(2)
-
-	if pid == 0 {
-		// in child process now
-		if attr != nil && attr.stdin != nil {
-			if linux.close(stdin_fds[IN]) != .NONE { linux.exit(1) }
-			if _, errno = linux.dup2(stdin_fds[OUT], STDIN); errno != .NONE { linux.exit(1) }
-			if linux.close(stdin_fds[OUT]) != .NONE { linux.exit(1) }
-		}
-		if attr != nil && attr.stdout != nil {
-			if linux.close(stdout_fds[OUT]) != .NONE { linux.exit(1) }
-			if _, errno = linux.dup2(stdout_fds[IN], STDOUT); errno != .NONE { linux.exit(1) }
-			if linux.close(stdout_fds[IN]) != .NONE { linux.exit(1) }
-		}
-		if attr != nil && attr.stderr != nil {
-			if linux.close(stderr_fds[OUT]) != .NONE { linux.exit(1) }
-			if _, errno = linux.dup2(stderr_fds[IN], STDERR); errno != .NONE { linux.exit(1) }
-			if linux.close(stderr_fds[IN]) != .NONE { linux.exit(1) }
-		}
-
-		if errno = linux.execveat(dir_fd, executable, &cargs[OUT], env); errno != .NONE {
-			print_error(stderr, _get_platform_error(errno), string(executable))
-			panic("execve failed to replace process")
-		}
-		unreachable()
-	}
-
-	// in parent process
-	if attr != nil && attr.stdin != nil {
-		linux.close(stdin_fds[OUT])
-		_construct_file(attr.stdin, uintptr(stdin_fds[IN]))
-	}
-	if attr != nil && attr.stdout != nil {
-		linux.close(stdout_fds[IN])
-		_construct_file(attr.stdout, uintptr(stdout_fds[OUT]))
-	}
-	if attr != nil && attr.stderr != nil {
-		linux.close(stderr_fds[IN])
-		_construct_file(attr.stderr, uintptr(stderr_fds[OUT]))
-	}
-
-	child.pid = int(pid)
-	return child, nil
-}
-
-_process_release :: proc(p: ^Process) -> Error {
-	// We didn't allocate...
-	return nil
-}
-
-_process_kill :: proc(p: ^Process) -> Error {
-	res := linux.kill(linux.Pid(p.pid), .SIGKILL)
-	return _get_platform_error(res)
-}
-
-_process_signal :: proc(sig: Signal, h: Signal_Handler) -> Error {
-	signo: linux.Signal
-	switch sig {
-	case .Abort:                    signo = .SIGABRT
-	case .Floating_Point_Exception: signo = .SIGFPE
-	case .Illegal_Instruction:      signo = .SIGILL
-	case .Interrupt:                signo = .SIGINT
-	case .Segmentation_Fault:       signo = .SIGSEGV
-	case .Termination:              signo = .SIGTERM
-	}
-
-	sigact: linux.Sig_Action(int)
-	old: ^linux.Sig_Action(int) = nil
-
-	switch v in h {
-	case Signal_Handler_Special:
-		switch v {
-		case .Default:
-			sigact.special = .SIG_DFL
-		case .Ignore:
-			sigact.special = .SIG_IGN
-		}
-	case Signal_Handler_Proc:
-		sigact.handler = (linux.Sig_Handler_Fn)(v)
-	}
-
-	return _get_platform_error(linux.rt_sigaction(signo, &sigact, old))
-}
-
-_process_wait :: proc(p: ^Process, t: time.Duration) -> (state: Process_State, err: Error) {
-	safe_state :: proc(p: Process, state: Process_State = {}) -> (Process_State, Error) {
-		// process_get_state can fail, so we don't want to return it directly.
-		if new_state, err := _process_get_state(p); err == nil {
-			return new_state, nil
-		}
-		return state, nil
-	}
-
-	state.pid = p.pid
-
-	options: linux.Wait_Options
-	big_if: if t == 0 {
-		options += {.WNOHANG}
-	} else if t != time.MAX_DURATION {
-		ts: linux.Time_Spec = {
-			time_sec  = uint(t / time.Second),
-			time_nsec = uint(t % time.Second),
-		}
-
-		@static has_pidfd_open: bool = true
-
-		// pidfd_open is fairly new, so don't error out on ENOSYS
-		pid_fd: linux.Pid_FD
-		errno: linux.Errno
-		if has_pidfd_open {
-			pid_fd, errno = linux.pidfd_open(linux.Pid(p.pid), nil)
-			if errno != .NONE && errno != .ENOSYS {
-				return state, _get_platform_error(errno)
-			}
-		}
-
-		if has_pidfd_open && errno != .ENOSYS {
-			defer linux.close(linux.Fd(pid_fd))
-			pollfd: [1]linux.Poll_Fd = {
-				{
-					fd = linux.Fd(pid_fd),
-					events = {.IN},
-				},
-			}
-			for {
-				n, e := linux.ppoll(pollfd[:], &ts, nil)
-				if e == .EINTR {
-					continue
-				}
-				if e != .NONE {
-					return state, _get_platform_error(errno)
-				}
-				if n == 0 {
-					return safe_state(p^, state)
-				}
-				break
-			}
-		} else {
-			has_pidfd_open = false
-			mask: bit_set[0..=63]
-			mask += { int(linux.Signal.SIGCHLD) - 1 }
-
-			org_sigset: linux.Sig_Set
-			sigset: linux.Sig_Set
-			mem.copy(&sigset, &mask, size_of(mask))
-			errno = linux.rt_sigprocmask(.SIG_BLOCK, &sigset, &org_sigset)
-			if errno != .NONE {
-				return state, _get_platform_error(errno)
-			}
-			defer linux.rt_sigprocmask(.SIG_SETMASK, &org_sigset, nil)
-
-			// In case there was a signal handler on SIGCHLD, avoid race
-			// condition by checking wait first.
-			options += {.WNOHANG}
-			waitid_options := options + {.WNOWAIT, .WEXITED}
-			info: linux.Sig_Info
-			errno = linux.waitid(.PID, linux.Id(p.pid), &info, waitid_options, nil)
-			if errno == .NONE && info.code != 0 {
-				break big_if
-			}
-
-			loop: for {
-				sigset = {}
-				mem.copy(&sigset, &mask, size_of(mask))
-
-				_, errno = linux.rt_sigtimedwait(&sigset, &info, &ts)
-				#partial switch errno {
-				case .EAGAIN: // timeout
-					return safe_state(p^, state)
-				case .EINVAL:
-					return state, _get_platform_error(errno)
-				case .EINTR:
-					continue
-				case:
-					if int(info.pid) == p.pid {
-						break loop
-					}
-				}
-			}
-		}
-	}
-
-	state, _ = safe_state(p^, state)
-
-	status: u32
-	errno: linux.Errno = .EINTR
-	for errno == .EINTR {
-		_, errno = linux.wait4(linux.Pid(p.pid), &status, options, nil)
-		if errno != .NONE {
-			return state, _get_platform_error(errno)
-		}
-	}
-
-	// terminated by exit
-	if linux.WIFEXITED(status) {
-		p.is_done = true
-		state.exited = true
-		state.exit_code = int(linux.WEXITSTATUS(status))
-		state.success = state.exit_code == 0
-		return state, nil
-	}
-
-	// terminated by signal
-	if linux.WIFSIGNALED(status) {
-		// NOTE: what's the correct behavior here??
-		p.is_done = true
-		state.exited = false
-		state.exit_code = int(linux.WTERMSIG(status))
-		state.success = false
-		return state, nil
-	}
-
-	return safe_state(p^, state)
-}
diff --git a/core/os/os2/process_windows.odin b/core/os/os2/process_windows.odin
deleted file mode 100644
index 4b5e4bc02..000000000
--- a/core/os/os2/process_windows.odin
+++ /dev/null
@@ -1,67 +0,0 @@
-//+private
-package os2
-
-import "core:runtime"
-import "core:time"
-
-_alloc_command_line_arguments :: proc() -> []string {
-	return nil
-}
-
-_exit :: proc "contextless" (_: int) -> ! {
-	runtime.trap()
-}
-
-_get_uid :: proc() -> int {
-	return -1
-}
-
-_get_euid :: proc() -> int {
-	return -1
-}
-
-_get_gid :: proc() -> int {
-	return -1
-}
-
-_get_egid :: proc() -> int {
-	return -1
-}
-
-_get_pid :: proc() -> int {
-	return -1
-}
-
-_get_ppid :: proc() -> int {
-	return -1
-}
-
-Process_Attributes_OS_Specific :: struct{}
-
-_process_find :: proc(pid: int) -> (Process, Error) {
-	return Process{}, nil
-}
-
-_process_get_state :: proc(p: Process) -> (Process_State, Error) {
-	return Process_State{}, nil
-}
-
-_process_start :: proc(name: string, argv: []string, attr: ^Process_Attributes) -> (Process, Error) {
-	return Process{}, nil
-}
-
-_process_release :: proc(p: ^Process) -> Error {
-	return nil
-}
-
-_process_kill :: proc(p: ^Process) -> Error {
-	return nil
-}
-
-_process_signal :: proc(sig: Signal, handler: Signal_Handler) -> Error {
-	return nil
-}
-
-_process_wait :: proc(p: ^Process, t: time.Duration) -> (Process_State, Error) {
-	return Process_State{}, nil
-}